{"id":"CVE-2021-36440","aliases":["GHSA-c442-3278-rhrg"],"url":"https://o3.security/vulnerability/CVE-2021-36440","summary":"Unrestricted File Upload in ShowDoc v2.9.5","details":"Unrestricted File Upload in ShowDoc v2.9.5 allows remote attackers to execute arbitrary code via the 'file_url' parameter in the component AdminUpdateController.class.php'.","published":"2021-09-08T21:15:10.657Z","modified":"2026-08-07T14:49:36.350360Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.04762,"percentile":0.91207,"asOf":"2026-08-21"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Packagist","name":"showdoc/showdoc","fixedVersion":"2.9.6"}],"fix":null,"references":[{"type":"REPORT","url":"https://github.com/star7th/showdoc/issues/1406"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T14:49:36.350360Z"}}